<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script type="text/JavaScript">
function up(lstr){ // converte minusculas em maiusculas
var str=lstr.value; //obtem o valor
lstr.value=str.toUpperCase(); //converte as strings e retorna ao campo
}
</script>